Question

The formula to convert celsius to fahrenheit is F=9/5c+32. convert 87° F to celsius .Round to the nearest degree

Answer 1

The answer would be 30 or 31 degrees. 

Answer 2

31°C

Explanation:

The formula to convert Celsius to Fahrenheit is F=9/5c+32.

To convert 87° F to Celsius plug in F = 87 in the above formula, we get

87 =
`-(9)/(5) c + 32`

Now we have to isolate the variable and the constant.

Subtract 32 from both sides, we get

87 - 32 =
`-(9)/(5) c + 32 - 32`

55 =
`-(9)/(5) c`

Multiply both sides by the reciprocal of -9/5

Which is called inverse operations to find the value of C.

The reciprocal of -9/5 is -5/9

`-(5)/(9) *55 = -(9)/(5) *-(5)/(9) C`

C = 275/9

C = 30.5°

To round off to the nearest degree, we get

31°C